Similar to axienet, the temac driver is now architecture agnostic, andcan be at least compiled for several architectures.Especially the fact that this is a soft IP for implementing in FPGAsmakes the current restriction rather pointless, as it could literallyappear on any architecture, as long as an FPGA is connected to the bus.

The driver hasn't been actually tried on any hardware, it is just adrive-by patch when doing the same for axienet (a similar patch foraxienet is already merged).